A Holocene peat record in the central South Atlantic: an archive of precipitation changes
Peat deposits from the littoral part of the wetland 2nd Pond on Nightingale Island in the central South Atlantic have been analysed to investigate the Holocene climate development on the island and to test a hypothesis about regionally persistent humidity variations. A variety of proxies were analys...
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2011
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Online Access: | https://lup.lub.lu.se/record/2494289 https://doi.org/10.1080/11035897.2011.633708 |
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ftulundlup:oai:lup.lub.lu.se:cf739592-80e1-461f-99b5-67fede2e6881 2023-05-15T13:50:27+02:00 A Holocene peat record in the central South Atlantic: an archive of precipitation changes Lindvall, Hanna Björck, Svante Holmgren, Sofia Ljung, Karl Van der Putten, Nathalie Porter, Charles 2011 https://lup.lub.lu.se/record/2494289 https://doi.org/10.1080/11035897.2011.633708 eng eng Taylor & Francis https://lup.lub.lu.se/record/2494289 http://dx.doi.org/10.1080/11035897.2011.633708 wos:000299035100007 scopus:84859051104 GFF; 133(3-4), pp 195-206 (2011) ISSN: 2000-0863 Geology South Atlantic Ocean Nightingale Island Holocene peat contributiontojournal/article info:eu-repo/semantics/article text 2011 ftulundlup https://doi.org/10.1080/11035897.2011.633708 2023-02-01T23:29:07Z Peat deposits from the littoral part of the wetland 2nd Pond on Nightingale Island in the central South Atlantic have been analysed to investigate the Holocene climate development on the island and to test a hypothesis about regionally persistent humidity variations. A variety of proxies were analysed - total carbon and nitrogen, biogenic silica, diatoms, amount of organic matter, macrofossils and magnetic susceptibility - and together with the lithology they are interpreted as a record reflecting changes in humidity/precipitation. Early Holocene (10,000-8500 cal. BP) was possibly significantly drier than today, probably caused by a southerly displacement of the Southern Hemisphere Westerlies (SHW) during the Antarctic climate optimum. From 8500 cal. BP and onwards, the climate became generally more humid and surface run-off increased due to higher precipitation, possibly as an effect of increased influence from the SHW as it moved north. During this generally humid period, our data disclose a distinct pattern of recurrent centennial- to millennial-long events of increased precipitation and the results corroborate the only other study in the region with a similar humidity record. The events might represent large-scale climate oscillations in the Southern Hemisphere, such as latitudinal shifts of the SHW, but may also be related to changes in sea surface temperatures. Article in Journal/Newspaper Antarc* Antarctic South Atlantic Ocean Lund University Publications (LUP) Antarctic The Antarctic GFF 133 3-4 195 206 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology South Atlantic Ocean Nightingale Island Holocene peat |
spellingShingle |
Geology South Atlantic Ocean Nightingale Island Holocene peat Lindvall, Hanna Björck, Svante Holmgren, Sofia Ljung, Karl Van der Putten, Nathalie Porter, Charles A Holocene peat record in the central South Atlantic: an archive of precipitation changes |
topic_facet |
Geology South Atlantic Ocean Nightingale Island Holocene peat |
description |
Peat deposits from the littoral part of the wetland 2nd Pond on Nightingale Island in the central South Atlantic have been analysed to investigate the Holocene climate development on the island and to test a hypothesis about regionally persistent humidity variations. A variety of proxies were analysed - total carbon and nitrogen, biogenic silica, diatoms, amount of organic matter, macrofossils and magnetic susceptibility - and together with the lithology they are interpreted as a record reflecting changes in humidity/precipitation. Early Holocene (10,000-8500 cal. BP) was possibly significantly drier than today, probably caused by a southerly displacement of the Southern Hemisphere Westerlies (SHW) during the Antarctic climate optimum. From 8500 cal. BP and onwards, the climate became generally more humid and surface run-off increased due to higher precipitation, possibly as an effect of increased influence from the SHW as it moved north. During this generally humid period, our data disclose a distinct pattern of recurrent centennial- to millennial-long events of increased precipitation and the results corroborate the only other study in the region with a similar humidity record. The events might represent large-scale climate oscillations in the Southern Hemisphere, such as latitudinal shifts of the SHW, but may also be related to changes in sea surface temperatures. |
format |
Article in Journal/Newspaper |
author |
Lindvall, Hanna Björck, Svante Holmgren, Sofia Ljung, Karl Van der Putten, Nathalie Porter, Charles |
author_facet |
Lindvall, Hanna Björck, Svante Holmgren, Sofia Ljung, Karl Van der Putten, Nathalie Porter, Charles |
author_sort |
Lindvall, Hanna |
title |
A Holocene peat record in the central South Atlantic: an archive of precipitation changes |
title_short |
A Holocene peat record in the central South Atlantic: an archive of precipitation changes |
title_full |
A Holocene peat record in the central South Atlantic: an archive of precipitation changes |
title_fullStr |
A Holocene peat record in the central South Atlantic: an archive of precipitation changes |
title_full_unstemmed |
A Holocene peat record in the central South Atlantic: an archive of precipitation changes |
title_sort |
holocene peat record in the central south atlantic: an archive of precipitation changes |
publisher |
Taylor & Francis |
publishDate |
2011 |
url |
https://lup.lub.lu.se/record/2494289 https://doi.org/10.1080/11035897.2011.633708 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic South Atlantic Ocean |
op_source |
GFF; 133(3-4), pp 195-206 (2011) ISSN: 2000-0863 |
op_relation |
https://lup.lub.lu.se/record/2494289 http://dx.doi.org/10.1080/11035897.2011.633708 wos:000299035100007 scopus:84859051104 |
op_doi |
https://doi.org/10.1080/11035897.2011.633708 |
container_title |
GFF |
container_volume |
133 |
container_issue |
3-4 |
container_start_page |
195 |
op_container_end_page |
206 |
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1766253513054093312 |